package net.tyw.web.task;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.ThreadPoolExecutor;


/**
 * @author jtoms
 */
@Configuration
public class AsyncTaskExecutePool {

    /**
     * 配置属性类，见上面的代码
     */
    @Autowired
    private TaskThreadPoolConfig config;

    @Bean
    public ThreadPoolTaskExecutor taskAsyncPool() {

        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(config.getCorePoolSize());
        executor.setMaxPoolSize(config.getMaxPoolSize());
        executor.setQueueCapacity(config.getQueueCapacity());
        executor.setKeepAliveSeconds(config.getKeepAliveSeconds());

        /**
         * rejection-policy：当pool已经达到max size的时候，如何处理新任务
         *
         * CALLER_RUNS：不在新线程中执行任务，而是由调用者所在的线程来执行
         */
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        executor.initialize();
        return executor;
    }
}
